Mandrel.



No. 788,154. PATENTBD APR. 25, 1905. J. A. a H. W. HOOK.

MANDREL.

APPLICATION FILED sBPT. 22, 190s.

Patented April 25, 1905.

UNTTBD STATES PATENT OFFICEo J'OllhY A. HOOK AND HENRY W. HOOK, OF YOUNGSTCHVN, OHIO.

NIANDREL.

SPECIFICATION forming part of Letters Patent No. 788,154, dated April 25, 1905.

Application filed September 22,1903. Serial No. 174,207.

To 11]/ l/'/vom 'if 11mg/ concern:

Be it known that we, JeuxY A. Hook and H nxur W. lloeli,citizens of the United States, residing' at Youngstown, in the county of Mahoning' and State of Ohio, have invented a new and useful improvement in Mandi-els, of which the following' is a specification.

Om' invention relates to apparatus for shaping and welding pipe couplings, sockets, and the like, provided with countersunk recesses at their ends.

In our Patent No. 748,948, g'ranted January 5, lflU-l, is described apparatus for welding recessed pipe couplings or sockets. the essential features of which area cluster of weldingrolls, together with a mandrel, the latter com" prising a central working portion corresponding in diameter and shape to the interior of the coupling to be formed and portions of enlarged diameter at both sides of said working portion, which project into the pass of the rolls and form the recesses in the ends of the coupling'. Preferably the working faces of the enlarged portions are beveled and the mandrel is made in two transversely-separable sections to enable the welded coupling' to be removed therefrom. The sections are held in place in the rolls by means of cooperating annular shoulders on the mandrel-seetions and rolls. ln the use of this apparatus it was found that the mandrel wears quite rapidly, and especially on the beveled faces of the enlarged end portions thereof.

The present invention has for its object to provide a mandrel having means for compen sating' Vfor the wear and preventing slackness or movement in the parts.

ln the accompanying drawings, Figure l is a view, partly in elevation and partly in section, of our improved mandrel wit-h one of the cooperating' weldingrolls. Fig. 2 is a sectional view of the mandrel after use and correction, and Fig. 3 shows one of the washers or disks for taking' up wear.

Our improved mandrel may be used with any form of welding' apparatus, such as hammer-dies, but preferably will be used in conjunction with a cluster of weldinga'olls, such as are well known in the art. ln use the cluster generally consists` of five rolls, althoug'h either four or more than live may be employed, and the mandrel is located centrally within the cluster.

ln the drawings only one of the welding'- rolls has been shown, this being' designated by the numeral l and being' provided with the liang'es which are reduced to provide bearing-surfaces 3 for the enlarged portions of the mandrel and also to provide annular shoulderss for engaging similar shoulders on they mamlrel-seetirms to prevent endwise movement of the latter. The central portion of the rolls is provided with the working' face 'lhese rolls will be mounted and driven in any approved manner.

The essential element of our apparatus eonsists of the mandrel, which preferably is made in two transversely-separal)le sections in order to enable the welded coupling' to be removed therefrom. 'l`hese sections when united form a mandrel having a central working' portion H, corresponding insize and contour to thc diameter and internal shape of the coupling' to be made. At each side of this working' face are enlarged portions i3 and Q5, respectively, which during the operation of the apparatus cooperate with the bearing-faces 3 of the roll-flanges and project inwardly be vond said flanges into the pass of the rolls to form the countersunk recesses in the ends of the coupling'. lhe inner faces of these cnlarged portions preferably are beveled, as shown at E27. One of the mandrol-sections is provided with a socket 2S for receiving' a tcat or projection ll) on the other section in order to aline said sections. One of the sections is provided with a handle T formanipulating the same, and said mandrel-sections are provided with the annular shoulders l2 and 26, respectively, for (.fonlacting' with the annular shoulders Je of the rolls, so as to prevent endwise movement and separation of the mandrel-sections. 'lhese mandrels are subjected to considerable wear, and more especially on the bevel-faces 2T thereof, and the shoulders 1Q and '.26 also wear to a considerable extent. 'lhe present invention has for its object to provide means for compensating or taking up this wear. rl`o thisend the larger mandrel-section is made up of an arbor IOO which preferably is integral with and a conl tinuation of the handle 7. On this arbor is l a collar 8, and the end of the arbor is threaded, as at 9, for receiving a nut which also forms the plug or teat 10, above referred to. Preferably this plug and the recess 28 in which it fits are slightly tapered, as shown. The central working face of the mandrel 14 is formed as a sleeve surrounding the arbor 6, While the enlarged portion 13 is likewise formed as a sleeve, and the bearing-shoulder 12 is formed by another sleeve,'and between the portion 12 and the collar 8 on the arbor is still another sleeve, 11. The sleeves 11, 12, 13, and 14 are held between the collar 8 and nut 10. The other mandrel-section 25 is also formed as a sleeve having a portion 23 of reduced diameter to provide a bearing-face 24, which contacts with the liange 2 of the rolls. The section is also provided with an enlarged bore for receiving the head 19 of the shaft 15. Outside of the sleeve and surrounding the shaft is a bearing-collar 20, which can be moved longitudinally of the shaft toward the sleeve by means of nuts 21, working on a threaded portion 22 of the shaft 15. The outer end of this shaft 15 is threaded, as at 16, and passes through a perforated bearing and is held in said bearing by means of nuts 27 on either side thereof. rlhis bearing preferably is pivoted, as at 18, and the usual means will be provided for adjusting' the same and holding it in Xed position.

In the use of the mandrel and rolls wear will occur mostly at the bevel-faces 27 and on the annular shoulders 12 and 26. When this occurs, the mandrel is taken out, the nut 10 removed, and the sleeve 14 or 13, or both, are faced off at their ends. Then a wear-compensating disk or washer 29 is placed between the sleeves 12 and 13 and the parts again assembled. rlhe effect of this will be to move the sleeve 13 inwardly sufliciently far to compensate for the wear of the bevel-face thereof and also to move the sleeve 12 outwardly suiiiciently far to compensate for the wear on the annular shoulder. The wear on the face 26 is compensated for by either moving the shaft 15 inwardly by adjusting the nuts 17 or by moving the collar 2O inwardly against the sleeve portion by means of the adj usting-nu ts 21, or both. The adj usting-nu ts 21 also serve to take up any wear that may occur between the head 19 and sleeve 23. Before this adjustment is made the inner end of the section 25 or the end of the sleeve 14, or both, will be faced off. In this manner all wear of the mandrel is compensated for. The mandrel, furthermore, being made of sections, can have any portion thereof renewed when worn out or broken without discarding the entire mandrel.

In case the mandrel is to be used for forming couplings which are recessed at one end only the enlarged portion 25 may be omitted,

and in that case the sleeve 14 will be of sufcient i length to project between and contact with the flanges 2 of the rolls.

IVhat we claim is* 1. In apparatus for welding recessed pipecouplings and the like, the combination of welding-rolls each provided with a working face and iianges or collars at the sides of said working face, and a mandrel cooperating with said rolls, said mandrel comprising a central portion corresponding in diameter and shape to the interior of the coupling, a portion of enlarged diameter at one side of said central portion and arranged to contact with the flanges of the rolls, said central and enlarged portions being in separate parts, means for securing said parts together, and means for advancing said enlarged portion toward said central portion to compensate for wear.

2. A mandrel for use in welding recessed pipe-couplings and the like, comprising a central sleeve corresponding in diameter and shape to the interior of the coupling, a sleeve of enlarged diameter at one side of said central sleeve, an arbor on which said sleeves are mounted, a shoulder on said arbor, and a wearcompensating disk between said shoulder and the enlarged sleeve whereby the latter may be advanced toward the central sleeve to compensate for wear.

3. A mandrel for use in welding recessed pipe-couplings and the like, comprising an arbor, separate sleeves thereon forming respectively a central working portion, an enlarged portion at one side thereof and an annular bearing-shoulder, and a wear-compensating disk interposed between the sleeves forming the enlarged portion and the annular shoulder.

4. In apparatus for forming recessed pipecouplings and the like, the combination of a roll provided with a working face and fianges at the sides thereof and having an annular bearing' shoulder formed on one of said flanges, and a mandrel cooperating with said roll and comprising an arbor, and sleeve portions thereon forming respectively a central working face, an enlarged portion at one side thereof and an annular bearing-shoulder arranged to cooperate with the bearing-shoulder of the roll, and a wear-compensating disk interposed bet-Ween the sleeves forming the enlarged portion and the annular bearingshoulder. y

5. A mandrel for use in welding recessed pipe-couplings and the like, consisting of two transversely-separable sections, one comprising a central portion corresponding in diameter and shape to the interior of the coupling, a portion of enlarged diameter at one side ofsaid central portion, said central and enlarged portions being formed as separate parts, means for securing said parts together, and means for advancing said enlarged portion toward said central portion to compensate for wear.

TOO

6. A mandrel for use in welding recessed l pipe-couplings and the like, consisting of two transversely-separable sections, one section comprising an enlarged end portion and the other section comprising a central sleeve corresponding in diameter and shape to the interior of the coupling, an end sleeve of enlarged diameter, an arbor on which said sleeves are mounted, a shoulder on said arbor, and a wear-coinpensating disk placed between said shoulder and said enlarged sleeve whereby to advance the latter toward the central sleeve to compensate for wear.

T. ln apparatus for forming recessed pipecouplings and the like, the combination of a i roll provided with a working face and flanges on the sides thereof and having an annular bearing-shoulder formed on one of said fianges, and a mandrel comprising two transverselyseparable sections, one of said sections forming an enlarged end portion projecting into the pass of the rolls and the other consisting of an arbor and three sleeves or collars thereon, one forming the central portion of the mandrel, another forming an enlarged end portion projecting into the pass of the rolls, and the third forming an annular shoulder to cooperate with the annular shoulder of the roll, and a disk interposed between the last two sleeves to compensate for wear.

8. A mandrel for use in welding recessed pipe-couplings andthe like, consisting of two transversely-separable sections, one comprising the main body portion and an enlargement at one end thereof, and the other being' an enlarged end portion, a stationary shaft on which the latter is rotatably mounted, and means for adjusting said end portion longitudinally on said shaft to compensate for wear. i

i). A mandrel for use in welding' recessed pipe-couplings and the like, consisting of two transversely-separable sections, one comprisl l l i ing the main body and an enlarged end portion and the other comprising an enlarged end portion formed as a sleeve provided with an enlarged bore, a stationary sha-ft provided with a head litting in the bore of said sleeve, l

and an adjusting-nut on said shaft and holding said sleeve toward said head.

10. A mandrel for use in welding recessed pipe-couplings and the like, consisting of two transversely-separable sections one of said sections comprising the main body and an enlarged end portion, and the other comprising an enlarged end portion, a shaft on which said latter section is rotatably mounted, and means for adjusting said shaft longitudinally to compensate for wear.

l1. A mandrel for use in welding' recessed pipe-couplings and the like, consisting of two transversely-separable sections, one comprising an enlarged end portion provided with a socket, a stationary shaft on which the same is mounted, means for moving the same lougitudinally to compensate for wear, and the other portion comprising au arbor provided with a shoulder, a sleeve thereon forming the central portion of the mandrel.l another sleeve thereon forming an enlarged end portion, a wearcompensating disk between said last sleeve and a shoulder on the mandrel, and a nut on the end ot the arbor securing said sleeves in position and adapted to enter the recess in the other mamlrel-scctiou.

l2. A mandrel for use in welding recessed pipe-couplings and the like, consisting of two transversely-separable sections one comprising a central portion and an enlarged portion at one side thereof, said central and enlarged portions being formed as separate sleeves, an arbor on which the same are mounted, a shoulder on said arbor, a wear-compensating disk between said shoulder and the sleeve forming the enlarged end portion, and the other mandrel-section comprising an enlarged end portion, a stationary shaft on which the same is rotatably mounted, and a nut for adjusting the same longitudinally on said shaft.

JOHN A. HOCK. HENRY lV. HOLK.

VitneSSQS:

L. KAUFFMAN, l). VAN l'lonN. 

